Yarn tensioning device for textile machines



March 17, 1936. w ERs r AL 2,034,356-

' YARN TENSIONING DEVICE FOR TEXTILE MACHINES Filed July 17, 193

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Patented Mar. 17, 1936 PATENT OFFICE v YARN TENSIONING DEVICE FOR TEXTILE MACHINES Wilhelm Reiners and Gustav Kahliseh, Gladbach-Rheydt, Germany, assignors to W. Schlafhorst & 00., Gladbach-Rheydt, Germany, a

German corporation Application July 17, 1934, Serial No. 735,110 In Germany August 2, 1933 4 Claims. (Cl. 242-147) The invention relates to yarn or thread tensioners for creeling frames and other textile machines, of the kind in which the yarn passes between two rotating disks acting as a brake thereon. Generally a weight urges one of the disks towards the other, to produce the necessary friction with the yarn. In case the yarn breaks the drive of the disks must be stopped, and an automatic stop motion device, which becomes operative on breakage of the yarn, is commonly used for that purpose.

Our invention is concerned with machines in which several such tensioning devices are used together, for dealing with an equal number of threads. According to the invention a plurality of such devices, which may comprise all those in the machine or a selected number thereof, have a common drive, but arrangements are made enabling the stop motion device of each tensioner to become operative and stop the drive of the respective brake disks without interfering with the drive of the other brake disks.

Several embodiments of the invention are shown in the accompanying drawing.

Figs. 1 to 3 show one form of construction,

Fig. 1 being an elevation of one of the tensioning units, with the brake disks in section, Fig. 2 a plan view thereof, and Fig. 3 a plan view of a series of the units.

Figs. 4 and 5 illustrate a modification of a detail of the driving gear, Fig. 4 being an elevation and Fig. 5 a plan view.

Figs. 6 and? are respectively an elevation and a plan view showing another form of construction.

Figs. 8 and 9 show a further modification, Fig. 8 being an elevation and Fig. 9 a sectional plan view.

Figs. 10 and 11 show a modification in which a belt drive is used, Fig. 10 being an elevation and Fig. 11 a sectional plan view.

Referring first to the construction shown in Figs. 1, 2 and 3, each of the pedestals or supports a has a bearing for a short vertical spindle b, which has a toothed wheel 0 fixed to its lower end and'on which two brake disks i, 2 are splined. A weight d is laid upon the upper brake disk 2, and may be splined to the spindle so that it rotates therewith. 'The weight can be changed if required, and it is convenient to have a supply of weights of diflerent, distinctive colors, so that it can be seen at a glance what load there is on each tensioning device. A horizontal driving shaft 6 extends along the bank of spindles b, below the same, and has fixed thereto friction gear wheels e, which drive the wheels 0 by friction.

At 1 there is pivoted to each support a yarn guide and stop motion lever g, slotted at one end for guiding the yarn a: and having at its other end a tooth 9 adapted to engage the toothed wheel c. The tension of the yarn engaged with the lever a normally holds the tooth 9 clear of the gear wheel 0, as shown in Fig. 1, but if and when the yarn breaks the lever rocks by gravity so that the tooth 9 drops into engagement with one of the tooth gaps c of the wheel c and stops the drive.

Instead of having friction wheels on the shaft 6 for driving the spindles b we may use toothed driving gear with friction clutches which slip when the stop motion devices come into operation.

An example is shown in Figs. 4 and 5. In this case the toothed wheels 0 on the spindles b are engaged with toothed wheels n coupled with the shaft 6 by friction clutches n held in engagement by springs n Bevel gearing may be used instead of spur gears if desired.

In the modification shown in Figs. 6 and '7 worm gears o, p, with friction clutches n p, are used for driving the spindles b, which have toothed wheels 0 thereon solely for engagement with the levers y when the yarn breaks.

In the modification shown in Figs. 8 and 9 the spindle b is axially movable and has a friction disk q fixed to its lower end, normally in contact with a friction wheel r fixed to the shaft 6. Fixed to the pivot f of the thread, breakage detector lever 9 below the disk q, is a finger h, and when breakage of yarn releases the lever the sam is rocked by aweight g thereon, so that the finger h lifts the disk q out of contact with the wheel 1', and the drive is stopped.

In the modification shown in Figs. 10 and 11 each spindle b has a pulley i fixed thereto, and all the pulleys i are engaged with an endless driving belt I: driven by a pulley m and taking a zig-zag course over the pulleys 2'. Each spindle has also a toothed wheel c thereon, adapted to be engaged by the lever g, as described with reference to Figs. 1 to-4.

What we claim as our invention and desire to driving means coupling each of said spindles to said common drive, a thread breakage detector associated with each spindle, and means positively connected with each spindle adapted to be engaged by the associated thread breakage detector to stop the spindleto'which it is connected.

2. A yarn tensioning mechanism as described in claim 1, wherein said means positively connected with each spindle comprises a friction disk through which the drive is transmitted from said common drive, said thread breakage detector having a cam movable to disengage said friction disk when the thread breaks.

3. A yarn tensioning mechanism as described in claim 1, wherein said common drive comprises a separate driving pulley for each of said spindles and an endless driving belt common to all said spindles. v

4. A yarn tensioning mechanism as described in claim 1, wherein said common drive comprises a separate driving pulley for each of said spindles and an endless driving belt taking a zig-zag course over all said pulleys.

WILHEIM REINERS. GUSTAV KAHLISCH. 

